And it ought to surprise nobody that trophy wives in 4runners show up with their vehicle in a statistically different state of repair than single moms in Altimas.
The big failures that you really want to avoid almost never show up on safety inspection data because they typically render the car much less drivable so they either get fixed promptly or the car stops coming around for it's inspection.
If you have car brand A that has a reputation for having catastrophically expensive failures in major components, and car brand B which just keep chugging along for decades, you will probably see an elevated failure rate for brand B since it is still driving, while brand A will not be failing since it has already failed so badly it has been scrapped.